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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 (Driver Assistance System (ADAS Control Unit) (DTC/Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK FUSES

    Check if any of the following fuses are blown:

    Signal name Fuse No.
    Ignition power supply 22

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Replace the blown fuse after repairing the affected circuit if a fuse is blown.

  2. CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT

    Check voltage between ADAS control unit harness connector and ground.

    Terminal Condition Voltage
    (Approx.)
    (+) (-)
    ADAS control unit Ground Ignition switch
    Connector Terminal
    T18 12 OFF 0 V
    ON Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair the ADAS control unit power supply circuit.

  3. CHECK ADAS CONTROL UNIT GROUND CIRCUIT

    1. Turn the ignition switch OFF.
    2. Disconnect the ADAS control unit connector.
    3. Check for continuity between ADAS control unit harness connector and ground.
      ADAS control unit Ground Continuity
      Connector Terminal
      T18 5 Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair the ADAS control unit ground circuit.

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